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ECAT Pre General Science Mathematics Chapter 24 Vectors Online Test MCQs With Answers
Question # 1
The physical quantity which possesses both magnitude and direction is called a
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scalar
vector
constant
none of these
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Question # 2
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[0, 0, 0]
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]
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Question # 3
A vector with magnitude one is called
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constant vector
unit vector
zero vector
null vector
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Question # 4
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none of these
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Question # 5
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1
0
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Question # 6
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none of these
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Question # 7
Which of the following is a vector.
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energy
force
work
power
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Question # 8
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direction ratios
direction cosines
direction angles
none of these
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Question # 9
Which of the following is a vector.
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work
time
density
electric field
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Question # 10
The physical quantity which can be specified by a number alongwith unit is called a
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scalar
vector
constant
none of these
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Question # 11
Which of the following represents a vector
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(x, y)
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Question # 12
The unit vector along y-axis is
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none of these
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Question # 13
If a,b,c are unit vectors then |a + b|2 +|a - b|2
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4
8ab
9cos
4(a,b)
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Question # 14
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A,. B, C are coincident
A, B, C are collinear
Both A and B
None of these
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Question # 15
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Question # 16
The unit vector along z-axis is
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none of these
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Question # 17
If a +b +c =0 then which of the following is true
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a =b =c =0
a,b =b,c =c,a
a xb=b xc =c xa
None
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Question # 18
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Question # 19
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0
90°
180°
360°
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Question # 20
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Question # 21
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none of these
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Question # 22
If a2 = b2 then
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a = b
a+b= 1
|a+b| =0
None
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Question # 23
Which of the following is a scalar.
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force
frequency
weight
acceleration
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Question # 24
If Projvu = Projuv, then
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Uand vare parallel
|u|=|v|
Uandvre perpendicular
One ofuorv
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Question # 25
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Question # 26
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Question # 27
The null vector is regarded to be perpendicular to
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Every vector
In some cases
Both a b
None
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Question # 28
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none of these
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Question # 29
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l
2
+ m
2
+ n
2
= 0
l
2
- m
2
+ n
2
= 1
l
2
+ m
2
+ n
2
= 1
l
2
+ m
2
- n
2
= 0
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Question # 30
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Question # 31
The position vector of the point P(a, b, c) is
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